Uveso made some text files on pastebin and linked them in this thread some time ago not sure how much of the work that had to be done back then is still unfinished and how much new content we added since then that didn't come with translations.I'll poke him and ask him to make a new paste with stuff that needs to be translated for you.

we currently have a PR which was mostly done by rackover and some suggestions by keyserif you want to help you can check it out or wait until it is available easily via the develop game mode and then look at the changes in game